CN102598751B - Method for cell interference coordination and base station - Google Patents
Method for cell interference coordination and base station Download PDFInfo
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Abstract
A method for cell interference coordination and a base station are provided. The method includes that a serving base station receives each backhual signal transmitted by each cooperative base station, and the backhual signal is determined by the cooperative base station, according to intensity of the received signal from a serving user, and by the serving base station, according to intensity of the received signal from an interference user in the cooperative base station (101); the serving base station, according to the type of each backhual signal, at different stages of baseband processing, carries out combination processing to the backhual signal corresponding to the type and the received user signal from each user (102).; Embodiments of the invention can utilize backhual transmission capability maximumly, raises backhual transmission efficiency, and at the same time can reach better performance.
Description
Technical field
The embodiment of the present invention relates to the communication technology, relates in particular to a kind of method for cell interference coordination and base station.
Background technology
At present, the capacity of mobile radio system is mainly limited to presence of intercell interference, for head it off, numerous researchers propose the mutual cooperation between base station, the signal of crossing over cell boarder propagation is made full use of, rather than be used as and disturb or noise, thereby improve spectrum efficiency and system coverage rate.From operator's angle, the prime cost of cooperation between base stations comes from backhaul (Backhua1) facility connecting between base station.Therefore, low as far as possible for guaranteeing the cost of backhaul infrastructure between upgrading base station, determine that effective backhaul coordination strategy becomes key issue place.
In the prior art, the information that backhual between base station transmits is generally a kind of information in the soft bit information after estimated signal, decoding bit information after treatment and the soft demodulation after reception signal, the equilibrium treatment after quantification treatment, for example, when transmission quantize after reception signal time, under interference scene, can obtain best cooperation between base stations performance, capacity requirement to backhual is larger, and in the time of the bit information of transmission after decoding, less to the capacity requirement of backhual; In prior art, also utilize some coding techniquess transmission data to be carried out compressed encoding and improved the efficiency of transmission of backhaul.
At least there is following defect realizing in finding prior art in process of the present invention in inventor: prior art does not consider performance and the backhaul capacity of cooperation between base stations, makes the efficiency of transmission of backhaul lower.
Summary of the invention
The embodiment of the present invention is to provide a kind of method for cell interference coordination and base station, utilizes substantially backhaul transport capacity, improves backhaul transport efficiency.
To achieve these goals, the embodiment of the present invention provides a kind of method for cell interference coordination, comprising:
Receive each returned signal of each cooperative base station transmission, described returned signal is described cooperative base station according to the signal strength signal intensity of the service-user receiving and serving BS according to the signal strength signal intensity of interference user in the described cooperative base station receiving and definite;
According to the type of described each returned signal, in the different phase of Base-Band Processing, the returned signal of corresponding types and the subscriber signal from each user receiving are merged to processing.
The embodiment of the present invention provides a kind of base station, comprising:
Receiver module, for receiving each returned signal of each cooperative base station transmission, described returned signal is described cooperative base station according to the signal strength signal intensity of the service-user receiving and serving BS according to the signal strength signal intensity of interference user in the described cooperative base station receiving and definite;
Merge module, for according to the type of described each returned signal, in the different phase of Base-Band Processing, the returned signal of corresponding types and the subscriber signal from each user receiving are merged to processing.
A kind of method for cell interference coordination and base station that the embodiment of the present invention provides, the signal strength signal intensity of the service-user receiving according to self by cooperative base station and serving BS are selected to the returned signal of serving BS transmission respective type according to the signal strength signal intensity of the interference user receiving, serving BS is according to the type of the returned signal receiving, different phase in Base-Band Processing merges itself and subscriber signal, the present embodiment utilizes backhaul transport capacity substantially, improve backhaul transport efficiency, can obtain preferably performance simultaneously.
Accompanying drawing explanation
In order to be illustrated more clearly in the embodiment of the present invention or technical scheme of the prior art, to the accompanying drawing of required use in embodiment or description of the Prior Art be briefly described below, apparently, accompanying drawing in the following describes is some embodiments of the present invention, for those of ordinary skills, do not paying under the prerequisite of creative work, can also obtain according to these accompanying drawings other accompanying drawing.
Fig. 1 is the flow chart of method for cell interference coordination embodiment mono-of the present invention;
Fig. 2 is the system architecture schematic diagram in method for cell interference coordination embodiment mono-of the present invention;
Fig. 3 is the signal processing schematic diagram in method for cell interference coordination embodiment mono-of the present invention;
Fig. 4 is the flow chart of method for cell interference coordination embodiment bis-of the present invention;
Fig. 5 is the structural representation of base station embodiment mono-of the present invention;
Fig. 6 is the structural representation of base station embodiment bis-of the present invention.
Embodiment
For making object, technical scheme and the advantage of the embodiment of the present invention clearer, below in conjunction with the accompanying drawing in the embodiment of the present invention, technical scheme in the embodiment of the present invention is clearly and completely described, obviously, described embodiment is the present invention's part embodiment, rather than whole embodiment.Based on the embodiment in the present invention, those of ordinary skills, not making the every other embodiment obtaining under creative work prerequisite, belong to the scope of protection of the invention.
Fig. 3 is the signal processing schematic diagram in method for cell interference coordination embodiment mono-of the present invention, and as shown in Figure 3, base station can comprise and remove Cyclic Prefix (Cyclic Prefix the processing procedure of signal; Hereinafter to be referred as: fast Fourier transform (Fast Fourier Transform CP); Hereinafter to be referred as: FFT), channel estimating (Channel Est.), least mean-square error (Minimum Mean Square Error; Hereinafter to be referred as: MMSE)/disturb and suppress to merge (Interference Rejection Combining; Hereinafter to be referred as: IRC), inverse discrete Fourier transform (Inverse Discrete Fourier Transform; Hereinafter to be referred as: IDFT), soft demodulation (Demodu.) and decoding (Decod.).Wherein, from antenna reception to signal be quantize reception signal, be that time domain receives signal, be that frequency domain receives signal through removing the FFT signal after treatment of CP, estimated signal after channel estimating and MMSE/IRC signal after treatment are equilibrium treatment again, soft bit information after IDFT and Demodu. signal after treatment are soft demodulation is decoding bit signal after treatment through Decod. signal after treatment.
Fig. 1 is the flow chart of method for cell interference coordination embodiment mono-of the present invention, as shown in Figure 1, the present embodiment provides a kind of method for cell interference coordination, the present embodiment describes technical scheme of the present invention from serving BS one side, and the method for cell interference coordination that the present embodiment provides can specifically comprise the steps:
Step 101, serving BS receives each returned signal of each cooperative base station transmission, and described returned signal is described cooperative base station according to the signal strength signal intensity of the service-user receiving and serving BS according to the signal strength signal intensity of interference user in the described cooperative base station receiving and definite.
Fig. 2 is the system architecture schematic diagram in method for cell interference coordination embodiment mono-of the present invention, as shown in Figure 2, supposes that this network comprises M+1 base station, base station 0, base station 1, base station 2 ... base station M, K user, user 1, user 2 ... user K.Wherein, service-user is user 1, interference user be other users 2 except service-user ... user K; The base station at service-user place is numbered 0, and base station 0 is serving BS, base station 1 ... the cooperative base station that base station M is serving BS, also can be described as cooperation point.
Back haul link in the present embodiment specifically refers to the link between target BS and cooperative base station, and returned signal is the signal that cooperative base station is transmitted to target BS on back haul link.Serving BS is according to Reference Signal Received Power cooperation point (the Reference Signal Receiving Power measuring; Hereinafter to be referred as: RSRP) signal strength signal intensity selects 1-base station, base station M as cooperation point.For example, can select base station that the value of RSRP signal strength signal intensity is positioned at the typical strength range setting as cooperative base station, the base station that physical distance that also can chosen distance serving BS is positioned at the typical range scope setting is as cooperative base station.All cooperative base station all can receive user 1, user 2 ... the signal of user K, wherein, user 1 is the service-user of serving BS 0, all the other are interference user.
Further, the present embodiment can also specifically comprise the steps: that cooperative base station, by the signal strength signal intensity of the service-user that relatively receives and the first default intensity threshold, determines whether to transmit to serving BS the signal of the service-user receiving.Or serving BS, by the signal strength signal intensity of interference user in the cooperative base station relatively receiving and the second default intensity threshold, determines whether to transmit to serving BS the signal of interference user in the cooperative base station receiving.
In the present embodiment, serving BS receives the returned signal of each cooperative base station transmission, the type of the returned signal of each cooperative base station transmission may be different, and in the cooperative base station that the signal strength signal intensity of the service-user that cooperative base station receives according to self and serving BS receive, the signal strength signal intensity of interference user selects to determine the type of returned signal.Wherein, the concrete signal strength signal intensity according to interference user in the cooperation cell receiving of serving BS determines whether cooperative base station sends returned signal to serving BS.Be that cooperative base station is in the time carrying out signal transmission with serving BS, not in prior art, the signal receiving is all transferred to serving BS by cooperative base station, but decide the returned signal of any type of transmission to serving BS according to the signal strength signal intensity receiving and interference signal intensity.
Particularly, the type of the returned signal from each cooperative base station that in the present embodiment, serving BS receives can be from the signal of service-user and/or the signal of interference user, and returned signal includes but not limited to the soft bit information after estimated signal, decoding bit information after treatment, the soft demodulation after reception signal, the equilibrium treatment after quantification treatment.The returned signal that is cooperative base station transmission can obtain signal merging gain and disturb the signal that suppresses gain according to the service-user of being convenient to of the selected transmission of actual conditions of self for cooperative base station, to realize the maximum using to backhaul transport capacity, can obtain preferably performance simultaneously.Returned signal in the present embodiment is described cooperative base station according to the signal strength signal intensity of the service-user receiving and serving BS according to the signal strength signal intensity of interference user in the described cooperative base station receiving and definite.
More specifically, cooperative base station, by the signal strength signal intensity of the service-user that relatively receives and the first default intensity threshold, is determined to the type of the returned signal of serving BS transmission; Serving BS, by the signal strength signal intensity of interference user in the cooperative base station relatively receiving and the second default intensity threshold, is determined the type of described cooperative base station to the returned signal of serving BS transmission.Wherein, the first intensity threshold and the second intensity threshold in the present embodiment all can specifically be set according to actual conditions, mainly set according to the high low value of the signal strength signal intensity that can receive under different scenes; As thought that this signal strength signal intensity is higher in the time that the signal strength signal intensity of service-user is 5, can be set to 5 by the first intensity threshold, as thought that this signal strength signal intensity is lower in the time that the signal strength signal intensity of interference user is 2, can be set to 2 by the second intensity threshold; Also can the first intensity threshold and the second intensity threshold be set to equal value, as being all set to 3, in the time that the signal strength signal intensity of certain signal is greater than 3, show that this signal is stronger, in the time that the signal strength signal intensity of certain signal is less than 3, a little less than showing that this signal is.
More specifically, the signal strength signal intensity of the service-user receiving when cooperative base station is greater than the first default intensity threshold, and when in the cooperative base station that serving BS receives, the signal strength signal intensity of interference user is less than the second default intensity threshold, this step 101 can be specially: receive the returned signal of described cooperative base station transmission, the signal that this returned signal is described service-user.The first intensity threshold and the second intensity threshold herein can be set according to actual conditions, also can the two be set to equal numerical value.Continue referring to above-mentioned Fig. 2, for example, the signal strength signal intensity h of the service-user 1 that cooperative base station 1 receives
1,1very strong, i.e. h
1,1be greater than the first intensity threshold, and user in this cooperative base station 1 community, place is service-user 1, this service-user 1 is not interference user with respect to serving BS 0, and the signal strength signal intensity of the interference user that now serving BS 0 receives is 0, is less than the second intensity threshold; The returned signal that now cooperative base station 1 is transferred to serving BS 0 only includes the signal of service-user 1, and does not transmit the signal of other interference users.The signal power of the above-mentioned service-user receiving due to cooperative base station 1 in is for example very strong, and it is very weak to receive other users' signal, only selects transmission service user's signal to serving BS, can make serving BS picked up signal merge gain.The signal type of the returned signal that further, in this step, serving BS receives can be the estimated signal after equilibrium treatment, soft bit information or the decoding bit information after treatment after soft demodulation.Because all can providing signal, the soft bit information after the estimated signal after above-mentioned equilibrium treatment, soft demodulation and decoding bit information after treatment merge the energy of gain, cooperative base station is by transmitting the returned signal of one of above three types to serving BS, can facilitate for serving BS calculates signal merging gain, to improve the cooperation performance between base station.
Or, the signal strength signal intensity of the service-user receiving when cooperative base station is greater than the first default intensity threshold, and when in the cooperative base station that serving BS receives, the signal strength signal intensity of interference user is greater than the second default intensity threshold, above-mentioned steps 101 can be specially: receive the returned signal of cooperative base station transmission, this returned signal can be specially the signal of interference user in the signal of described service-user and cooperative base station.The signal strength signal intensity h of the service-user 1 that for example, cooperative base station 2 receives
2,1very strong, i.e. h
2,1be greater than the first intensity threshold, and user in this cooperative base station 1 community, place is user 2, it is interference user with respect to serving BS 0; And the signal strength signal intensity h of the interference user 2 that serving BS receives
0,2also very strong, i.e. h
0,2be greater than the second intensity threshold, the returned signal that now cooperative base station 2 is transferred to serving BS comprises the signal of service-user 1 and the signal of interference user 2.Above-mentioned for example in because cooperative base station 2 and serving BS 0 receive service-user 1 that signal strength signal intensity is stronger and the signal of interference user 2 simultaneously, select the signal of while transmission service user 1 and interference user 2 to serving BS, can make serving BS 0 gain of picked up signal merging simultaneously and disturb inhibition gain.Further, the signal of the service-user of cooperative base station that in this step, serving BS receives transmission can be specially reception signal or the decoding bit information after treatment after the quantification treatment of service-user, and the signal of the interference user that serving BS receives can be reception signal or the decoding bit information after treatment after the quantification treatment of interference user.Because the signal strength signal intensity of service-user and interference user is all higher, cooperative base station, by merging gain and disturb the signal that suppresses gain to be all transferred to serving BS as returned signal being convenient to calculate signal, merges gain and disturbs and suppress gain to make serving BS can get signal simultaneously.
Or, the signal strength signal intensity of the service-user receiving when cooperative base station is less than the first default intensity threshold, and when in the cooperative base station that serving BS receives, the signal strength signal intensity of interference user is greater than the second default intensity threshold, above-mentioned steps 101 can be specially: receive the returned signal of cooperative base station transmission, this returned signal can be specially the signal of interference user in described cooperative base station.The signal strength signal intensity h of the service-user 1 that for example, cooperative base station 3 receives
3,1very weak, i.e. h
3,1be less than the first intensity threshold, and user in these cooperative base station 3 communities, place is user 3, it is interference user with respect to serving BS 0; And the signal strength signal intensity h of the interference user 3 that serving BS receives
0,3very strong, i.e. h
0,3be greater than the second intensity threshold, the returned signal that now cooperative base station 3 is transferred to serving BS only includes the signal of interference user 3.The signal of the above-mentioned service-user 1 receiving due to cooperative base station 3 in for example a little less than, and that serving BS 0 receives the signal of interference user 3 is stronger, select the signal of transmission interference user 3 to serving BS, can make serving BS 0 to obtain and disturb inhibition gain.The signal of the interference user of cooperative base station that further, this step receives transmission can be specially the reception signal after the quantification treatment of interference user.Because can providing, the reception signal after upper quantification treatment disturbs the energy that suppresses gain, cooperative base station is by the returned signal to serving BS transmission the type, can disturb inhibition gain to facilitate for serving BS calculates signal, to improve the cooperation performance between base station.
Or, the signal strength signal intensity of the service-user receiving when cooperative base station is less than the first default intensity threshold, and when in the cooperative base station that serving BS receives, the signal strength signal intensity of interference user is less than the second default intensity threshold, the present embodiment can also comprise the steps: to receive the backhaul index signal of described cooperative base station transmission, this backhaul index signal is used to indicate this cooperative base station and does not send returned signal to serving BS, cooperative base station can notification service base station not to its transmission information.The signal strength signal intensity h of the service-user 1 that for example, cooperative base station M receives
m, 1very weak, i.e. h
m, 1be less than the first intensity threshold, and user in community, this cooperative base station M place is user M, it is interference user with respect to serving BS 0; And the signal strength signal intensity h of the interference user M that serving BS receives
0, Malso very weak, i.e. h
0, Mbe less than the second intensity threshold, now cooperative base station M can not transmit any useful signal to serving BS.The signal of the service-user 1 receiving due to cooperative base station M in above-mentioned giving an example is very weak, and the signal of the interference user M that serving BS receives is also very weak, the signal of the service-user 1 that now cooperative base station M receives helps very little for serving BS 0 obtains signal merging gain, and the interference that interference user M produces serving BS 0 is also very little, it obtains and disturbs the impact of inhibition gain also very little for serving BS 0, and cooperative base station M is without transmit any signal to serving BS.
Step 102, serving BS, according to the type of described each returned signal, merges processing in the different phase of Base-Band Processing by the returned signal of corresponding types and the subscriber signal from each user receiving.
Serving BS after the returned signal receiving from each cooperative base station, dissimilar according to returned signal, the subscriber signal from each user returned signal and serving BS self being received in the different phase of corresponding Base-Band Processing merges processing.Introduced from above-mentioned, the returned signal that serving BS receives is to divide according to the different phase of Base-Band Processing, therefore receiving after returned signal, when serving BS merges itself and the subscriber signal from each user that self receives, the returned signal of different phase type is merged with the subscriber signal in corresponding stage.
Particularly, still in conjunction with above-mentioned Fig. 3, when reception signal after returned signal is quantification treatment,, in the time that serving BS receives the subscriber signal of frequency domain or time domain, this returned signal and subscriber signal are merged; Soft bit information after returned signal is soft demodulation, carries out after soft demodulation process subscriber signal at serving BS, then this returned signal and subscriber signal are merged; When estimated signal after returned signal is equilibrium treatment, at serving BS, subscriber signal is carried out after MMSE/IRC processing, then this returned signal and subscriber signal are merged; In the time that returned signal is decoding bit information after treatment, at serving BS, subscriber signal is carried out after decoding processing, then this returned signal and subscriber signal are merged.In the present embodiment, the merging processing of indication is returned signal is merged in subscriber signal, is transferred in serving BS the two is combined into a signal.
The present embodiment provides a kind of method for cell interference coordination, the signal strength signal intensity of the service-user receiving according to self by cooperative base station and serving BS are selected to the returned signal of serving BS transmission respective type according to the signal strength signal intensity of the interference user receiving, serving BS is according to the type of the returned signal receiving, different phase in Base-Band Processing merges itself and subscriber signal, the present embodiment utilizes backhaul transport capacity substantially, improve backhaul transport efficiency, can obtain preferably performance simultaneously.
Fig. 4 is the flow chart of method for cell interference coordination embodiment bis-of the present invention, as shown in Figure 4, the present embodiment provides a kind of method for cell interference coordination, the present embodiment describes technical scheme of the present invention from cooperative base station one side, and the method for cell interference coordination that the present embodiment provides can specifically comprise the steps:
Step 401, cooperative base station is selected the type of returned signal according to the signal strength signal intensity of interference user in the described cooperative base station receiving according to the signal strength signal intensity of the service-user receiving and serving BS.
The signal strength signal intensity of the service-user that in this step, cooperative base station receives according to self and serving BS select to determine the type of returned signal according to the signal strength signal intensity of interference user in the described cooperative base station receiving.Be that the not existing signal receiving of cooperative base station is all transferred to serving BS, but determine that according to the signal strength signal intensity receiving and interference signal intensity the returned signal that transmits any type is to serving BS.Particularly, the type of the returned signal to serving BS transmission that cooperative base station is selected can be from the signal of service-user and/or the signal of interference user, and returned signal includes but not limited to the soft bit information after estimated signal, decoding bit information after treatment, the soft demodulation after reception signal, the equilibrium treatment after quantification treatment, cooperative base station obtains according to the service-user of being convenient to of the selected transmission of actual conditions of self signal that signal merges gain and disturbs inhibition gain.
Particularly, the signal strength signal intensity of the service-user receiving when cooperative base station is greater than the first default intensity threshold, and when in the cooperative base station that serving BS receives, the signal strength signal intensity of interference user is less than the second default intensity threshold, cooperative base station is selected the signal that returned signal is described service-user, and the signal of this service-user is soft bit information or decoding bit information after treatment after estimated signal, the soft demodulation after equilibrium treatment, to make target BS picked up signal merge gain.Or, the signal strength signal intensity of the service-user receiving when cooperative base station is greater than the first default intensity threshold, and when in the cooperative base station that serving BS receives, the signal strength signal intensity of interference user is greater than the second default intensity threshold, the signal that cooperative base station selection returned signal is described service-user and the signal of interference user, and the signal of this service-user can be reception signal or decoding bit information after treatment after quantification treatment, the signal of interference user can be reception signal or the decoding bit information after treatment after quantification treatment, to make the target BS gain of picked up signal merging simultaneously and to disturb and suppress gain.Or, the signal strength signal intensity of the service-user receiving when cooperative base station is less than the first default intensity threshold, and when in the cooperative base station that serving BS receives, the signal strength signal intensity of interference user is greater than the second default intensity threshold, cooperative base station is selected the signal that returned signal is described interference user, the signal of this interference user can be the reception signal after quantification treatment, disturbs inhibition gain so that serving BS can be obtained.Or, the signal strength signal intensity of the service-user receiving when cooperative base station is less than the first default intensity threshold, and when in the cooperative base station that serving BS receives, the signal strength signal intensity of interference user is less than the second default intensity threshold, cooperative base station sends backhaul index signal to serving BS, sends returned signal to indicate no longer to serving BS.
Step 402, cooperative base station is transmitted described returned signal to serving BS, so that described serving BS, according to the type of described each returned signal, merges processing in the different phase of Base-Band Processing by the returned signal of corresponding types and the subscriber signal from each user receiving.
Cooperative base station is to the selected returned signal of serving BS transmission above-mentioned steps 401, serving BS is receiving after the returned signal of each cooperative base station transmission, dissimilar according to returned signal, the subscriber signal from each user returned signal and serving BS self being received in the different phase of corresponding Base-Band Processing merges processing, the concrete processing procedure that merges can, as described in above-mentioned steps 102, repeat no more herein.
The present embodiment provides a kind of method for cell interference coordination, the signal strength signal intensity of the service-user receiving according to self by cooperative base station and serving BS are selected to the returned signal of serving BS transmission respective type according to the signal strength signal intensity of the interference user receiving, serving BS is according to the type of the returned signal receiving, different phase in Base-Band Processing merges itself and subscriber signal, the present embodiment is maximizing on the basis of cooperation between base stations performance as far as possible, utilize most effectively backhaul transport capacity, improve backhaul transport efficiency, can obtain preferably performance simultaneously.
One of ordinary skill in the art will appreciate that: all or part of step that realizes said method embodiment can complete by the relevant hardware of program command, aforesaid program can be stored in a computer read/write memory medium, this program, in the time carrying out, is carried out the step that comprises said method embodiment; And aforesaid storage medium comprises: various media that can be program code stored such as ROM, RAM, magnetic disc or CDs.
Fig. 5 is the structural representation of base station embodiment mono-of the present invention, as shown in Figure 5, the present embodiment provides a kind of base station, can be specially serving BS, and can carry out each step in said method embodiment mono-, repeat no more, the base station that the present embodiment provides can specifically comprise receiver module 501 and merge module 502 herein.Wherein, receiver module 501 is for receiving each returned signal of each cooperative base station transmission, and described returned signal is described cooperative base station according to the signal strength signal intensity of the service-user receiving and serving BS according to the signal strength signal intensity of interference user in the described cooperative base station receiving and definite.Merge module 502 for according to the type of described each returned signal, in the different phase of Base-Band Processing, the returned signal of corresponding types and the subscriber signal from each user receiving are merged to processing.
Fig. 6 is the structural representation of base station embodiment bis-of the present invention, as shown in Figure 6, the present embodiment provides a kind of base station, can be specially serving BS, and can carry out each step in said method embodiment mono-, repeat no more, the base station that the present embodiment provides can also comprise the first determination module 601 or the second determination module 602 herein.Wherein, the first determination module 601 for by cooperative base station by the signal strength signal intensity of the service-user that relatively receives and the first default intensity threshold, determine whether to the signal of the service-user receiving described in serving BS transmission.The second determination module 602 is for the signal strength signal intensity of the cooperative base station interference user by relatively receiving and default the second intensity threshold, determines whether to the signal of interference user in the cooperative base station receiving described in serving BS transmission.
Further, the first determination module 601 in the present embodiment specifically for by cooperative base station by the signal strength signal intensity of the service-user that relatively receives and the first default intensity threshold, determine to the type of the returned signal of serving BS transmission.The second determination module 602, specifically for the signal strength signal intensity of interference user in the cooperative base station by relatively receiving and the second default intensity threshold, is determined the type of described cooperative base station to the returned signal of serving BS transmission.
Particularly, the receiver module 501 in the present embodiment can specifically comprise the first receiving element 511, the second receiving element 521 or the 3rd receiving element 531.Wherein, the first receiving element 511 is greater than the first default intensity threshold for the signal strength signal intensity of the service-user that receives when cooperative base station, and when in the cooperative base station that serving BS receives, the signal strength signal intensity of interference user is less than the second default intensity threshold, receive the returned signal of cooperative base station transmission, the signal of described returned signal service-user.The second receiving element 521 is greater than the first default intensity threshold for the signal strength signal intensity of the service-user that receives when cooperative base station, and when in the cooperative base station that serving BS receives, the signal strength signal intensity of interference user is greater than the second default intensity threshold, receive the returned signal of cooperative base station transmission, the signal of interference user in the signal that described returned signal is service-user and described cooperative base station.The 3rd receiving element 531 is less than the first default intensity threshold for the signal strength signal intensity of the service-user that receives when cooperative base station, and when in the cooperative base station that serving BS receives, the signal strength signal intensity of interference user is greater than the second default intensity threshold, the returned signal that receives cooperative base station transmission, this returned signal is the signal of interference user in described cooperative base station.
Further, the base station that the present embodiment provides can also comprise index signal receiver module 603, index signal receiver module 603 is less than the first default intensity threshold for the signal strength signal intensity of the service-user that receives when cooperative base station, and when in the cooperative base station that serving BS receives, the signal strength signal intensity of interference user is less than the second default intensity threshold, receive the backhaul index signal that cooperative base station sends, described backhaul index signal is used to indicate described cooperative base station and does not send returned signal to described serving BS.
More specifically, the described returned signal that the first receiving element 511 in the present embodiment receives is specially the estimated signal after the equilibrium treatment of described service-user, soft bit information or the decoding bit information after treatment after soft demodulation.Or, the described returned signal that the second receiving element 521 receives is specially reception signal or the decoding bit information after treatment after the quantification treatment of described service-user, and reception signal or decoding bit information after treatment after the quantification treatment of described interference user.Or the described returned signal that the 3rd receiving element 531 receives is specially the reception signal after the quantification treatment of described interference user.
The present embodiment provides a kind of base station, by receiver module being set and merging module, the signal strength signal intensity of the service-user that receiver module reception cooperative base station receives according to self and serving BS are selected the returned signal of transmission according to the signal strength signal intensity of the interference user receiving, merge module according to the type of the returned signal receiving, different phase in Base-Band Processing merges itself and subscriber signal, the present embodiment is maximizing on the basis of cooperation between base stations performance as far as possible, utilize most effectively backhaul transport capacity, improve backhaul transport efficiency, can obtain preferably performance simultaneously.
Finally it should be noted that: above embodiment only, in order to technical scheme of the present invention to be described, is not intended to limit; Although the present invention is had been described in detail with reference to previous embodiment, those of ordinary skill in the art is to be understood that: its technical scheme that still can record previous embodiment is modified, or part technical characterictic is wherein equal to replacement; And these modifications or replacement do not make the essence of appropriate technical solution depart from the spirit and scope of embodiment of the present invention technical scheme.
Claims (16)
1. a method for cell interference coordination, is characterized in that, comprising:
Receive each returned signal of each cooperative base station transmission, described returned signal is described cooperative base station according to the signal strength signal intensity of the service-user receiving and serving BS according to the signal strength signal intensity of interference user in the described cooperative base station receiving and definite;
According to the type of described each returned signal, in the different phase of Base-Band Processing, the returned signal of corresponding types and the subscriber signal from service-user receiving are merged to processing.
2. method according to claim 1, is characterized in that, also comprises:
Cooperative base station, by the signal strength signal intensity of the service-user that relatively receives and the first default intensity threshold, determines whether to the signal of the service-user receiving described in serving BS transmission; Or
The signal strength signal intensity of serving BS by interference user in the cooperative base station relatively receiving and default the second intensity threshold, determine whether to the signal of interference user in the cooperative base station receiving described in serving BS transmission.
3. method according to claim 2, it is characterized in that, described cooperative base station is by the signal strength signal intensity of the service-user that relatively receives and the first default intensity threshold, determine whether to the signal of the service-user receiving described in serving BS transmission, be specially: cooperative base station, by the signal strength signal intensity of the service-user that relatively receives and the first default intensity threshold, is determined to the type of the returned signal of serving BS transmission; Or
Described serving BS is by the signal strength signal intensity of interference user in the cooperative base station relatively receiving and the second default intensity threshold, the signal of interference user in the cooperative base station that determines whether to receive described in transmitting to serving BS, be specially: serving BS, by the signal strength signal intensity of interference user in the cooperative base station relatively receiving and the second default intensity threshold, is determined the type of described cooperative base station to the returned signal of serving BS transmission.
4. method according to claim 3, it is characterized in that, the signal strength signal intensity of the described service-user receiving when described cooperative base station is greater than the first default intensity threshold, and when in the described cooperative base station that described serving BS receives, the signal strength signal intensity of interference user is less than the second default intensity threshold, each returned signal of the each cooperative base station transmission of described reception comprises:
Receive the returned signal of described cooperative base station transmission, the signal that described returned signal is service-user.
5. method according to claim 3, it is characterized in that, the signal strength signal intensity of the described service-user receiving when described cooperative base station is greater than the first default intensity threshold, and when in the described cooperative base station that described serving BS receives, the signal strength signal intensity of interference user is greater than the second default intensity threshold, each returned signal of the each cooperative base station transmission of described reception comprises:
Receive the returned signal of described cooperative base station transmission, the signal of interference user in the signal that described returned signal is service-user and described cooperative base station.
6. method according to claim 3, it is characterized in that, the signal strength signal intensity of the described service-user receiving when described cooperative base station is less than the first default intensity threshold, and when in the described cooperative base station that described serving BS receives, the signal strength signal intensity of interference user is greater than the second default intensity threshold, each returned signal of the each cooperative base station transmission of described reception comprises:
The returned signal that receives described cooperative base station transmission, described returned signal is the signal of interference user in described cooperative base station.
7. method according to claim 3, it is characterized in that, the signal strength signal intensity of the described service-user receiving when described cooperative base station is less than the first default intensity threshold, and when in the described cooperative base station that described serving BS receives, the signal strength signal intensity of interference user is less than the second default intensity threshold, also comprise:
Receive the backhaul index signal that described cooperative base station sends, described backhaul index signal is used to indicate described cooperative base station and does not send returned signal to described serving BS.
8. method according to claim 4, is characterized in that, described returned signal is specially the estimated signal after the equilibrium treatment of described service-user, soft bit information or the decoding bit information after treatment after soft demodulation.
9. method according to claim 5, it is characterized in that, described returned signal is specially reception signal or the decoding bit information after treatment after the quantification treatment of described service-user, and reception signal or decoding bit information after treatment after the quantification treatment of described interference user.
10. method according to claim 6, is characterized in that, described returned signal is specially the reception signal after the quantification treatment of described interference user.
11. 1 kinds of base stations, is characterized in that, comprising:
Receiver module, for receiving each returned signal of each cooperative base station transmission, described returned signal is described cooperative base station according to the signal strength signal intensity of the service-user receiving and serving BS according to the signal strength signal intensity of interference user in the described cooperative base station receiving and definite;
Merge module, for according to the type of described each returned signal, in the different phase of Base-Band Processing, the returned signal of corresponding types and the subscriber signal from each user receiving are merged to processing.
12. base stations according to claim 11, is characterized in that, also comprise:
The first determination module, for by cooperative base station by the signal strength signal intensity of the service-user that relatively receives and the first default intensity threshold, determine whether to the signal of the service-user receiving described in serving BS transmission; Or
The second determination module, for the signal strength signal intensity of the cooperative base station interference user by relatively receiving and the second default intensity threshold, the signal of interference user in the cooperative base station that determines whether to receive described in transmitting to serving BS.
13. base stations according to claim 12, it is characterized in that, described the first determination module, specifically for the signal strength signal intensity of the service-user by relatively cooperative base station receives and the first default intensity threshold, is determined to the type of the returned signal of serving BS transmission; Or
Described the second determination module, specifically for the signal strength signal intensity of interference user in the cooperative base station by relatively receiving and the second default intensity threshold, is determined the type of described cooperative base station to the returned signal of serving BS transmission.
14. base stations according to claim 13, is characterized in that, described receiver module comprises:
The first receiving element, the signal strength signal intensity that is used for the described service-user receiving when described cooperative base station is greater than the first default intensity threshold, and when in the described cooperative base station that described serving BS receives, the signal strength signal intensity of interference user is less than the second default intensity threshold, receive the returned signal of described cooperative base station transmission, the signal that described returned signal is service-user; Or
The second receiving element, the signal strength signal intensity that is used for the described service-user receiving when described cooperative base station is greater than the first default intensity threshold, and when in the described cooperative base station that described serving BS receives, the signal strength signal intensity of interference user is greater than the second default intensity threshold, receive the returned signal of described cooperative base station transmission, the signal of interference user in the signal that described returned signal is service-user and described cooperative base station; Or
The 3rd receiving element, the signal strength signal intensity that is used for the described service-user receiving when described cooperative base station is less than the first default intensity threshold, and when in the described cooperative base station that described serving BS receives, the signal strength signal intensity of interference user is greater than the second default intensity threshold, the returned signal that receives described cooperative base station transmission, described returned signal is the signal of interference user in described cooperative base station.
15. base stations according to claim 13, is characterized in that, also comprise:
Index signal receiver module, the signal strength signal intensity that is used for the described service-user receiving when described cooperative base station is less than the first default intensity threshold, and when in the described cooperative base station that described serving BS receives, the signal strength signal intensity of interference user is less than the second default intensity threshold, receive the backhaul index signal that described cooperative base station sends, described backhaul index signal is used to indicate described cooperative base station and does not send returned signal to described serving BS.
16. base stations according to claim 14, is characterized in that, the described returned signal that described the first receiving element receives is specially the estimated signal after the equilibrium treatment of described service-user, soft bit information or the decoding bit information after treatment after soft demodulation; Or
The described returned signal that described the second receiving element receives is specially reception signal or the decoding bit information after treatment after the quantification treatment of described service-user, and reception signal or decoding bit information after treatment after the quantification treatment of described interference user; Or
The described returned signal that described the 3rd receiving element receives is specially the reception signal after the quantification treatment of described interference user.
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| US11706064B2 (en) * | 2018-05-31 | 2023-07-18 | Indian Institute Of Technology Hyderabad | Method of receiving signal stream and a receiver |
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| US8260206B2 (en) * | 2008-04-16 | 2012-09-04 | Qualcomm Incorporated | Methods and apparatus for uplink and downlink inter-cell interference coordination |
| JP5608656B2 (en) * | 2008-09-26 | 2014-10-15 | テレフオンアクチーボラゲット エル エム エリクソン（パブル） | Techniques for uplink cooperation of access nodes |
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| CN101394210B (en) * | 2008-11-10 | 2012-05-30 | 哈尔滨工业大学 | Multi-base station cooperative user interference suppressing method for cell system |
| KR20100060185A (en) * | 2008-11-27 | 2010-06-07 | 삼성전자주식회사 | Apparatus and method for controlling interference in wireless communication system |
| CN101754262B (en) * | 2008-12-10 | 2012-11-14 | 中兴通讯股份有限公司 | Overload indicator report trigger method based on user terminal physical resource interference |
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| CN101373998A (en) * | 2007-08-20 | 2009-02-25 | 上海贝尔阿尔卡特股份有限公司 | Low information interactive multi-base station collaboration MIMO as well as scheduling method and apparatus thereof |
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| EP2273691A1 (en) * | 2008-04-07 | 2011-01-12 | Alcatel Lucent | Method and device for controlling and cooperating with transmitting downlink signal in wireless communication system |
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| JP2014520427A (en) | 2014-08-21 |
| EP2701417B1 (en) | 2016-08-03 |
| US20140086148A1 (en) | 2014-03-27 |
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| US9119084B2 (en) | 2015-08-25 |
| CN102598751A (en) | 2012-07-18 |
| JP5872683B2 (en) | 2016-03-01 |
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